I think you should get writing, Steve. Put it in the Tips and Tricks forum.
Who? Me!!??
I'm the
student on this subject. The best I could do is help edit/organize such a document. Indeed, I'm still narrowing my choises for my first purchase, so I'm as
green as they come

In my humble opinion and based soley on the responses in this thread, I'd say that Gordon and you are the subject-matter-experts regarding all things UPS. I think you guys would make great co-captains.
That said, I spent 5 minutes thinking about a structure for such a paper, which I'm sure could be improved.
The Fundamentals of Uninterruptible Power Supplies for the Amateur and Pro Musician
1. What is an Uninterruptible Power Supply (UPS)?
2. Why would I need a UPS?
3. If I have a backup generator, would I still need a UPS?
4. Common power problems
5. What is power supply hold time?
6. What is a UPS transfer time?
7. What are the needs of the home-studio musician?
8. What are the needs of the gigging musician?
9. How do I size a UPS to meet my needs?
10. Lead-Acid vs Lithium-Ion
11. Rack-mounted vs desktop tower
12. What about surge protection?
13. Budget considerations
14. Practical experiences and war stories with specific UPS’s
15. Do’s and Don’ts regarding UPS usage
16. Weblinks for further info